Method of making seamless connecter tubes



Nov. 23 ,1926. 1,608,180

w. NATHANS'ON ,ET AL METHOD OF MAKING SEAMLESS CONNECTER TUBES Filed April 7, 1924 2 Sheets-Sheet 1 mar fiiarm z Nov. 23 1926,

w. NATHANSON ET AL.

METHOD OF MAKING SEAMLESS CONiIECTER TUBES Sheets-Sheet 2 Filed April 7, 1924 VTILLIAM NATHAI$ON AND JACK Lill RECT AND IvZESli-E ASSIGIEL HALF TO OTTO A. ZINKE, ISO 11...

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or o ions-o, ILLIIEGIS, essrenons, BY DI- or on o -rroeeo, rumors.

ALF TO SAID JACK BEIEIILYI AND ONE- IVIETl-EOD OF MAKING CQIQ'IIEOTER TUBES.

Application filed April 7,

Our invention relates to a method of making a seamless connector tube, and more particularly to a method of making a seamless tube especially adapted for mounting or connecting it over the water outlet of an automobile radiator; and the particular object of the invention is to make such a tube by drawing it with a series of die operations from a single piece of sheet metal and without the formation of any seam, thus providing a smooth and nicely finished, seamless connecter tube.

Other objects will appear hereinafter.

The invention consists in the combina tions and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to accompanying drawings forming a part of this specification, and in which Fig. 1 illustrates a blank or piece out from a strip of sheet metal, from which the connector tube is formed;

Fig. 2 illustrates the shell or cap formed by the first step of our drawing operation;

Figs. 3 and l illustrate the contracting of the closed portion and expanding of the open portion, eifected by the two following drawing operations Fig. 5 illustrates the further drawing and the formation of flanges on the open portion;

Fig. 6 illustrates the provision of the opening at the closed upper end formed by the following step;

Fig. 7 illustrates the bending of the flanged end and arrangement of the longitudinal flange at substantially right angles to the lateral flange;

Fig. 8 shows the result of the next step in which the bent portion is smoothly curved or roundedand the lower part of the longitudinal flange is completed.

Fig. 9 shows the product with the flanges trimmed, as a result of the following step;

Fig. 10 shows the tube with the drain opening formed thereon by the following die operations;

Fig. 11 shows the tube with the additional bead formed on the contracted end, by the next step; and

Fig. 12 shows a section taken on line 1212 of Fig. 11.

The process or method of forming our Serial No. 794,?1L

seamless connector tube briefly comprises the drawing or forming of a shell or cap from a suitable blank of sheet metal to suitable shape and size, forming offset flanges at the open end of said shell or cap, providing an opening in the closed upper end opposite the flanged end, and bending or curving the flanged end and arranging, the flanges at a suitable angle to each other for attachment to the corner of a radiator. The material from which the blank is cut preferably consists of a sheet of brass, and ma also consist of sheets of cold rolled steel or annealed sheet steel, or sheets of any other suitable ductile material which is adapted to be drawn while cold.

The method above outlined explaining the formation of our improved seamless connecter tube may be executed with various auxiliary or subordinate steps, andv preferably includes the following particular steps in providing the finished device. The blank 14b is cut substantially oval in shape from a strip of suitable sheet metal, as shown in 1, and this is drawn by a suitable die operation into a shell or cap, as shown in 2, the end 14: of the blank being extended downward to form a bevelled portion 15 with a lower end 16 and an upper part 17 In the next step the closed upper portion 18 is slightly contracted and the bevelled open portion 15 is expanded, as shown in Fig. 3. In the succeeding step the contracted upper portion 18 is further contracted and elongated to the desired shape and size of the shank or tubular portion of the finished device, while the lower portion 15 is retained in shape, as shown in Fig. 4L. In the next operation the expanded portion 15 is extended downwardly and flanges 19 and 20 are formed on the edges of the open portion as shown in Fig. 5, the flange 19 extending laterally from the portion 15 and the flange 20 extending at an angle from flange 19 and longitudinally with the portion 15, as shown in Fig. 5. In the following step an opening 21 is cut or formed in the upper tubular portion 18, as shown in Fig. 6. In the following step the lower portion 15 is'bent at an angle from the tubular portion 18 and at the same time the flange 20 is bent to extend substantially at right angles from the flange 19, as shown in Fig. 7. In the following operation the bent portion 15 is smoothly curved and rounded and the lowerportion 20 of flange 20 is completed, as shown in Fig. 8. In the suc ceeding step the flanges are properly trimmed, as shown in Fig. 9.

The device outlined by the above disclosed steps is substantially adapted to be used in that form, but it is preferred to also provide a drain port on the device, and this is done by piercing the metal in the portion 15 and forming an annular ridge 22 with a flange 23, by means of suitable die press operation, to provide a drain port therein, as shown in 10, threads at being preterably also formed in the flange 23 tor securely retaining a closure member thereon. A ridge is preferably also formed around the upper part oi tubular portion 18, as shown in Fig. 11, for secure attachment of a hose thereto.

Our method as outlined above is preferably carried out with a series of successive die-press operations, and by the use of suitable dies; and although outlined chiefly :tor

producing connecter tubes with attaching flanges arranged for attaching the tube to an automobile radiator, it is apparent that the method is also well adapted ror making various tubes of a similar nature.

While we have illustrated and described the preferred form of construction for carrying our invention into etlect, this is capable of variation and modification without departing from the spirit of the invention. We therefore do not wish to be limited to the precise details of construction set forth, but desire to avail ourselves of such variations and modifications as come within the scope of the appended claims. Having described our invention, what we claim as new and desire to secure by Letters Patent is: v 1. The method or" making a seamless connecter tube, comprising the drawing of a shell from a sheet of metal to a shape having a narrower upper closed portion than the lower open portion, forming flanges on said open portion, forming an opening in said closed portion, and curving said open portion to extend the flanges at angles to each other.

The method of making a seamless connector tube, comprising the drawing of a shell from a sheet of metal to suitable shape having a closed tubular upper'portion and an enlarged lower portion, forming flanges on said lower portion, forming an opening in said upper portion, curving ,said flanged portion, and forming a ridge around said tubular portion adjacent the upper opening.

The method of making a seamless connector tul e, comprising the drawing of a sheet oi metal to substantially cap shape, elongating the closed end into tubular shape and expanding the lower end, forming flanges on said lower end, forming an open ing in said closed upper end, curving said flanged end and arranging the flanges at right angles to each other, and providing a flanged drain port in said curved lower portion.

4-. The method oi making a seamless connector tube, comprising the drawing of a sheet of metal to cap shape with a beveled open lower portion, contracting the upper closed portion, further contracting and elongating the closed portion into tubular shape, forming flanges on the open enlarged portion, forming an opening in the closed portion, bending aid flanged portion and extending said flanges at right angles to each other, curving said bent portion and completing the flanges, trimming said flanges, forming a flanged drain port in said curved portion, and forming an annular head around the upper end.

5. The method of making a s amless tube, comprising the drawing or a sheet of metal to a suitable shape having an upper closed tubular portion and a lower open extended portion, forming oflset flanges on said lower open portion, "forming an'opening in the top of the tubular portion, curving the lower open end, and providing a flanged drain port in said curved end.

in testimony whereof we have signed our names to this specification. i

' llTlIililAl/l NA'lHANSON.

JACK BEHM. V 

